Alan Bamford Williamson was the son of pharmaceutical chemist, Bamford Williamson, and his wife, Annia, and one of four brothers who attended the High School.

Three brothers (Kenneth, Cecil & Alan himself) served during and survived the war. The fourth brother, Ronald, was only 9 when war broke out, but went on to be a Flight Lieutenant with the RAF.

Alan joined the school in 1902 at the age of 9, and left in 1906 to board at Mill Hill School, North London, which he left in 1909.

On leaving school he gained a BSc in Mining Engineering, but It is unclear where he studied. However, it may have been Durham since he was trained at the Durham University Officer Training Corps, and received a commission as 2nd Lieutenant with the Royal Engineers (Tyne Electrical Engineers) in October 1914. He was later promoted to Captain.

He served in France from August, 1916, and in 1917 was promoted to General Staff Officer. Alan served at the War Office as Duty Staff Officer, and as such he received a telephone call from France with the first news of the imminent armistice.

After the war, Alan worked as a mining engineer, but in 1926 he went to Durham University to study medicine, and moved to Cheltenham to go into General Practice.

He died unexpectedly in 1947, at the age of 54.